// rbOOmit: An implementation of the Certified Reduced Basis method.
// Copyright (C) 2009, 2010 David J. Knezevic

// This file is part of rbOOmit.

// rbOOmit is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// rbOOmit is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#include "libmesh/rb_eim_theta.h"
#include "libmesh/rb_parameters.h"
#include "libmesh/rb_eim_evaluation.h"

namespace libMesh
{

RBEIMTheta::RBEIMTheta(RBEIMEvaluation & rb_eim_eval_in, unsigned int index_in)
  :
  rb_eim_eval(rb_eim_eval_in),
  index(index_in)
{
}

Number RBEIMTheta::evaluate(const RBParameters & mu)
{
  std::vector<RBParameters> mus {mu};
  std::vector<Number> values = evaluate_vec(mus);

  libmesh_error_msg_if(values.size() != 1, "Error: should have one value");
  return values[0];
}

std::vector<Number> RBEIMTheta::evaluate_vec(const std::vector<RBParameters> & mus)
{
  rb_eim_eval.rb_eim_solves(mus, rb_eim_eval.get_n_basis_functions());
  return rb_eim_eval.get_rb_eim_solutions_entries(index);
}

}
